# -*- coding: utf-8 -*-
# @Time    : 2021/4/15 21:36
# @Author  : Chen
# @Email   : 2356458272@qq.com
# @File    : 列表去重并从大到小排序.py
# @Software: PyCharm
a = [8,2,3,4,10,6,7,1,11,6,9,11,6,4,2,4]
b = {""}
for i in a:
    b.add(i)
b.remove("")
a = list(b)
print(a)